Blizzcon Videos?

I've been able to find quite a few of the discussion panels on youtube etc. And i thought that a post would be a good place to gather good quality vids into a colab so that it had one straight up place to find a list of different panel videos and you wouldnt have to go searching through tons of sites to find what u want. So if you know any good panels from blizzcon just post the link with the name of the panel

other than that i had a question that im sure will be easy to answer.

Is filming of the cataclysm demo at blizzcon agaisnt the rules, cuz i havn't seen any footage of that whatsoever?
I've never gone to one so i wouldnt know.
thx.